Research on parameter identification algorithm of PMSM

In engineering applications, the parameters of Parmanent Magnet Synchronous Machine(PMSM) are likely to be greatly deviated due to the change of environment.However, the change of electrical parameters will have a great influence on the control strategy of motor.This paper presents a parameter identification algorithm based on Levenberg-Marquardt algorithm(LM algorithm)to identify motor parameters. Firstly, the mathematical model of the motor is established. Then, the current and speed information of the motor are collected through locked-rotor and no-load experiments, and the collected information is identified by lm algorithm. The identification parameters are compared with the actual parameters to verify the effectiveness of the identification algorithm. Finally, the real current and speed information of the motor are collected by the real-time simulation simulation, so as to verify the validity and correctness of the scheme.